\begin{tikzpicture}
    \tkzDefPoints{0/0/C, 2.6/0/D, 3.5/1.5/E, 1.3/2/A, -0.5/1/B}
    \tkzDrawPolygon(A,B,C,D,E)
    \tkzDrawSegments(A,C  A,D  B,D  B,E C,E)
    \tkzLabelPoints[above](A)
    \tkzLabelPoints[left](B)
    \tkzLabelPoints[below](C,D)
    \tkzLabelPoints[right](E)
\end{tikzpicture}

